مُسْنَدُ أَحْمَدَ
Musnad Ahmad 4080
Musnad of Abdullah bin Mas'ood
Abdullah said: It is as if I can see the Messenger of Allah (ﷺ) telling us about one of the Prophets whose people struck him, and he was wiping the blood of his forehead and saying: "Lord forgive my people for they do not know."
Musnad Ahmad 4107Its isnad is saheeh, Muslim (1792)]